A gaseous compound is subjected to increased pressure. What is happening to the temperature at the same time?
We assume the gas is in a container.
If we increase the pressure, is a direct relationship with temperature, so the temperature increases, but if the volume is not constant, it will decrease.
Answer: increased temperature, decreased volume.
Explain in terms of energy transfer and motion of molecules what happens to the WAX when the candle is blown out.A: When the candle was blown out the wax ________ because the molecules _________ energy and moved _________.
When a candle is lit, a combustion reaction takes place that releases heat, this heat causes the temperature of the candle to increase and the state of the candle to be liquid. Molecules move due to heat.
When the candle blown out, the temperature begins to decrease and the liquid wax begins to solidify because the molecules move slower and slower. Therefore, the spaces of the obtained can be filled in the following way:
When the candle was blown out the wax solidifies because the molecules have low energy and moved slower.
please help with these 5 questions if they physical or chemical as well as intensive or extensive i will be giving brainliest thank u
Before categorizing each of the properties into physical or chemical, intensive or extensive, we need to understand the terms:
Physical property: This is any characteristic that can be determined without changing the substance’s chemical identity.
Chemical property: This is any characteristic that can be determined by simply changing the molecular structure of a substance
1) For the property: Its melting point is 112 degrees Celcius is a Physical property and intensive since extensive property depends on the amount of matter being measured.
2) If a substance burns in a presence of oxygen, it is a chemical property since the molecular structure of the resulting compound will be changed. This is also an intensive property.
3) If a substance is yellow solid is a physical property since the first is the color yellow and solid shows the state of the element. Neither property implies that the substance is changing its composition. Therefore, both properties are physical properties. This physical property is Intensive properties since it does not depend on the amount of the substance present.
4) If the substance is combustible, it is a chemical property and intensive property
5) For the sample of a substance that measures 75cm^3, this is a Physical property since the volume of a substance can be determined without changing its identity. This is also an extensive property since examples of these properties include mass, weight, and volume.
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In these given options, flooding is most likely to reduced human population.
Humans are affected by floods in a variety of ways, including: flooding can cause injury or death to individuals. Sewage is frequently present in floodwater, which can compromise clean drinking water and cause disease. Power supply may become unstable.Environmental stress is a term that refers to a variety of circumstances, such as food shortages, predator activity, and other density-dependent variables, that cause population growth to slow down.Therefore, the infrastructure in our environment and the ecosystem itself may be harmed by severe flooding. They can first demolish houses and render them inhabitable. Additionally, they can clear farms of sand, which makes it harder to cultivate crops. In addition to the aforementioned, flooding taints clean water, resulting in illnesses.
Limiting variables prevent populations from growing either through increased death rates or emigration, decreased birthrates or immigration, or a combination of these factors.
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3.Which of the following isotopes should be expected to be radioactive?Select one:a. Ab. Bc. Cd. D
Explanation:
To find the isotope that is expected to be radioactive we have to compare the given isotopes with the ones that we find the in the periodic table.
(A) Ti:
Isotope ----> atomic mass = 48 atomic number = 22
Periodic table ---> average atomic mass = 47.9 atomic number = 22
(B) Sr:
Isotope ----> atomic mass = 88 atomic number = 38
Periodic table ---> average atomic mass = 87.6 atomic number = 38
(C) Os:
Isotope ----> atomic mass = 192 atomic number = 76
Periodic table ---> average atomic mass = 190.2 atomic number = 76
(D) Pu:
Isotope ----> atomic mass = 244 atomic number = 94
Periodic table ---> average atomic mass = 244 atomic number = 94
If we take a look at them we will see that the only one that is different is osmium. The atomic mass of the isotope is 192 amu, that means that this isotope has 2 more neutrons than the average atom of the element. So we can expect that it could be radioactive.
Answer: C. Os
Question 1 (0.75 points)
The endocrine system, producer of hormones which are chemical messengers work
with the nervous system to control many different body functions such as
metabolism and growth.
True
or
False
The endocrine system, producer of hormones which are chemical messengers work with the nervous system to control many different body functions such as metabolism and growth is True.
What is endocrine system ?The endocrine system is a communication system that uses feedback loops to control distant target organs by controlling hormones secreted by internal glands of an organism directly into the circulatory system.
All endocrine systems in vertebrates are controlled neurally by the hypothalamus. Among the endocrine glands are: Two organs called the adrenal glands sit on top of the kidneys and secrete the stress hormone cortisol.
The pituitary gland receives instructions from the hypothalamus in the lower middle brain about when to release hormones. The female reproductive system's ovaries, which release eggs and sex hormones.
Thus, the endocrine system, producer of hormones which are chemical messengers work with the nervous system to control many different body functions such as metabolism and growth is True.
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Which of the following is true of
the eye of a hurricane?
A. Warm, moist bands of air move around the
eye.
B. The eye makes up the outer most layer of the
storm.
C. Hot and humid air rises up through the eye.
D. It only appears at the very beginning and very
end of the storm.
Answer: a
Explanation:
3.Which term best describes algae?
The term which best describes algae is Single-celled organisms or unicellular organism.
What is an Algae?A broad and varied collection of photosynthetic eukaryotic organisms are collectively referred to as algae informally. It is a polyphyletic group that consists of species from various separate clades.
What do you mean by Single-celled organisms?A single cell makes up a unicellular creature, also referred to as a single-celled organism, as opposed to a multicellular organism, which is made up of numerous cells.
Hence, The term which best describes algae is Single-celled organisms or unicellular organism.
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What is the compound name of this formula CuSO4 ?
Copper(II) sulfate.
Explanations:Before we name the given compound, we need to know what chemical compounds are. Chemical compounds are chemical substances composed of molecules formed from atoms of an element and held together by a chemical bond.
Given the chemical compound CuSO4, this compound contains copper, sulfur, and oxygen element.
The molecular compound CuSO4 is named with the first element first and then the second element by using the stem of the element name plus the suffix -ate
The compound name for CuSo4 will therefore be Copper(II) sulfate. The roman numeral of (II) comes from the sum of the oxidation state of the element.
Note that the oxygen atoms have a -2 oxidation number, and sulfur has a +6, oxidation number to have (4 * -2) + 6 = -2. This makes copper have an oxidation number of +2.
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Sigma bonds are single bonds formed by the head on collision between orbitals and pi -bonds are double bonds or triple bonds which are weaker than sigma bonds. There are 7 sigma bonds and one pi bond in acetic acid.
What is acetic acid?Acetic acid is a weak organic acid formed from methane croup. Its diluted form as vinegar is used as preservatives. Acetic acid contains the COOH acidic group. Where the C=O group is called carbonyl group.
A sigma bond is formed between head on overlap of two orbitals. It is more strong and forms single bonds. Pi bonds are formed by the sidewise overlapping of p orbitals. They are weak. In a double bond such as in C=O group one bond is pi bond and one is sigma bond.
First carbon in acetic acid forms sigma bonds with 3 hydrogens and one carbon and the second carbon has a sigma bond with an OH group. Thus there a total of 7 sigma bonds and 1 pi bond.
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is hydrogen Anion or Cation
Answer:
Hydrogen is a Cation, the only cation that has no electrons.
¿Is hydrogen Anion or Cation
A Hydrogen, it is well known that it is a Cation, since it is a positively charged particle.
¿What is hydrogen?A Hydrogen is a chemical element, which is the lightest that exists, its atom is made up of a proton and an electron and it is stable in the form of a diatomic molecule (H2).
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A student proposed the Bohr model below for sodium (Na). Is this student’s model correct? Justify your answer
The Bohr model is a representation of the electronic configuration of the atom. According to this model, each energy level can hold a certain number of electrons. In the first energy there can only be 2 electrons, in the second and the following energy levels there can be a maximum of 8 electrons.
Sodium, Na which has 11 electrons in total so in the first level it will have two electrons, in the second level it will have 8 electrons and in the third level it will have the missing electron.
In the model proposed by the student, the electrons are represented in blue. The model proposed by the student is incorrect.
We see that in the second energy level he drew 9 electrons, this is incorrect since from the second energy level there can only be 8 electrons, the remaining electron must be located in the third energy level.
calculate how many grams are in 0.10 moles of OH ions
1.7 grams are there in 0.10 moles of OH ions.
The mole is a unit of measurement or the starting point for determining the concentration of a chemical in a sample. Avogadro's constant, or 1 mole, is a quantity that is equal to 6.022 × 10²³ particles. Any species, such as atoms, molecules, electrons, protons, neutrons, etc., can make up.
Number of moles = Mass/ Molecular mass
Given, number of moles = 0.10
Molecular mass of OH = 17 g/mol
∴ Mass = Number of moles × Molecular mass
Mass = 0.10 × 17
Mass = 1.7 grams
Therefore, 1.7 grams are there in 0.10 moles of OH ions.
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Please answeeeerrr i neeed help look at imagine
Answer: D
Explanation:
State the worded equation for the reaction that occurred in a beaker when copper is placed in a beaker of silver nitrate.
The reaction of silver nitrate with copper is a substitution reaction. We have copper in its free state, Cu, and we have silver nitrate which has the formula AgNO3. The copper replaces the silver obtaining the following reaction:
[tex]2AgNO_{3(aq)}+Cu_{(s)}\rightarrow Cu(NO_3)_{2(aq)}+2Ag_{(s)}[/tex]The products obtained are copper nitrate and silver.
The word equation will be:
[tex]SilverNitrate+Copper\rightarrow Copper(II)Nitrate+Silver[/tex]which of the following molecules is/are produced by translation? include molecules that are subject to further modification after initial synthesis. select all that apply. which of the following molecules is/are produced by translation? include molecules that are subject to further modification after initial synthesis.select all that apply. the amino acid glycine rna polymerase aminoacyl-trna synthetase
Aminoacyl-tRNA synthetase and RNA polymerase are produced by translation.
Generally speaking, translation is the process of changing something from one form to another, such as a word from one language to another. In biology, translation is a process in which a strand of mRNA's genetic code is decoded to create a specific sequence of amino acids. It happens on the ribosomes in both prokaryotes and eukaryotes. However, in eukaryotes, it takes place on ribosomes that are attached to the surface of the endoplasmic reticulum (ER), allowing the newly formed protein to undergo additional maturation inside the ER after translation and then be labeled in the Golgi apparatus for transport inside or outside the cell. Both prokaryotes and eukaryotes go through the same basic translational process.
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Where would one find the s-block, p-block, d-block and f-block elements on the periodic table?
Answer:
You can find p-block elements on the periodic table in groups 13 to 18, you can find the s-block on the periodic table in group 1, Group 3 through Group 12 are d-block elements, and The f-block elements, found in the two rows at the bottom of the periodic table, are called inner transition metals and have valence electrons in the f-orbital's.
Explanation:
Hope this helps!
What is the most stable form of Calcium in terms of nuclear stability?
Answer
Calcium - 40 is the most stable and most likely to be found occurring naturally
Explanation
Nuclear stability means that the nucleus of the element is stable enough to not decay with the passing of time, this decay is known as radioactivity. When it comes to Calcium, we have many isotopes of this element, but only a few have such a long half-life that we can consider them to be stable, and Calcium - 40 is the most stable and common of them.
What type of nuclear radiation is given off in the nuclear reaction below?
35/16S→35/17Cl
Answer:
Beta radiation
Explanation:
we know the three types of nuclear radiation:
alpha beta gammaokay so first look at the mass number of both the product and reactant, we notice that the mass number for both remains 35.
immediately we can cross of the possibility of it being alpha radiation because an alpha particle is similar to that of helium nucleus, hence if it was alpha, the mass number of Cl would be 4 less.
now look at the atomic number, we notice that moving from S to Cl it increased by 1 which can only mean it was beta radiation.
Beta radiation is when a neutron inside to nucleus turns into a proton and an electron, the electron is ejected from the nucleus hence it's a high speed electron.
neutron --> proton + electron
the reason the mass number is the same is because a neutron and proton has a mass of 1 whilst the electron is too small to cause much change.
the reason for nuclear decay is mainly because the elements want to achieve more stability.
Which of the following units is used when measuring electrical power?
Answer:
Joules/sec and watts.
Explanation:
1 Joule/sec is a rate of energy expending every second. It is equal to a watt, the English term.
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Answer: A. The population is growing rapidly
15. Which of the following elements will have the most similar properties?
C. Helium and Hydrogen
D. Magnesium and Calcium
A. Helium and Carbon
B. Magnesium and Iron
The elements that showcase the most similar properties are Magnesium and Calcium due to having the same valency.
Helium and Hydrogen
Helium and Hydrogen are two completely different elements. Hydrogen forms various compounds with other elements, water H2O, Ammonia NH4, and carbohydrates C6H12O6 whereas Helium being a noble gas is a stable element that contains 8 electrons in its valence shell, i.e. the ideal amount and so does not react with other elements to make compounds.
Magnesium and Calcium
Magnesium and calcium have similar properties as they both contain only 2 electrons in their valence shell. Since all chemical properties are in one way or another dependent on valency, they display similar behavior.
Helium and Carbo
Helium a noble gas contains 8 electrons in its valence shell causing it to have no need to react with other elements. Thus Helium does not form any compounds whereas Carbon on the other hand containing 4 electrons in its valence shell is among the best elements for chain compounds. Due to carbon's ability to accept and donate the same amount of electrons as well as sharing electrons, it is the major element in all biotic materials.
Magnesium and Iron
Magnesium contains 2 electrons in its valence shell and has a tendency to lose them to attain Mg2+ ion. Magnesium has a set valency whereas Iron has multiple vacancies. Depending on the state of Iron it may exhibit a valency of 2 or 3. Due to Iron having a valency of 3 as well as 2 it differs from Magnesium in its chemical properties.
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Which formulas represent one ionic compound and one covalent compound?
a. N, and SO.
b. Cl, and H,S
c. BaCl and N.O,
d. Na,O and CaO
The formula NaO,CaO represents one ionic compound and one covalent compound.
An ionic compound is formed by ions made up of charged particles.A covalent compound is formed by sharing of electrons between two different elements.N exists as N2 which is covalently bonded and SO exists as S=O which is covalently bonded.Cl exists as Cl2 which is formed by sharing of electrons and is covalently bonded.HS has an electronegativity difference of 0.4 which is non-polar covalent compound.BaCl2 exists as an ionic compound as it is formed on basis of electrostatic attraction.NO exists as N=O which is a covalent compound.NaO exists as ionic compound and CaO exists as covalent compound.
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What is the empirical formula of a compound composed of 81. 71% c and 18. 29% h by mass?.
what is the total number of electron-pair domains (electron clouds) around the central atom in the sulfur tetrafluoride molecule? enter your answer as a numeral without leading or lagging spaces. g
Total number of electron-pair domains (electron clouds) around the central atom in the sulfurtetrafluoride molecule is five. which includes 4 bond pair 1 loan pair.
what is electron pair domain?An atom's electron domain is the number of lone pairs or chemical bond locations that surround it. It represents the number of locations expected to contain electrons. By knowing the electron domain of each atom in a molecule, you can predict its geometry.
“The electron geometry describes the spatial arrangement of a molecule’s bonds and lone pairs. VSEPR theory can be used to calculate electron geometry.”
The term electron geometry is the name of the electron pair/groups/domains on the central atom, whether they are bonding electrons or non-bonding electrons. Electron pairs are electrons that exist in pairs or bonds, as lone pairs or as a single unpaired electron. Because electrons are always in motion and their paths cannot be precisely defined, the electron arrangement in a molecule is described in terms of an electron density distribution.
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what is the molarity of the solution if the mole fraction of ethanol in water is 0.2 ?
Answer: 2.1M
Explanation:
Hence, the molarity of a solution of ethanol in water is 2.1M.
What do understanding isotopes explain on the periodic table 
How can she test this idea in the Flowing Water Model?
She test this idea in the Flowing Water Model through integrated water flow model
Flowing water model is the computer programmed for simulating water flow through the integrated land surface water and groundwater flow systems and hydroelectric energy is power made by the moving water and water always flow downhills because of gravity and she She test this idea in the Flowing Water Model through integrated water flow model
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How many grams of sodium hydroxide (NaOH) do you need to make 6.5 L of 1.0M solution?
260grams
Explanations:The formula for calculating the moles of NaOH is expressed as
[tex]\begin{gathered} moles=molarity\times volume \\ moles\text{ of NaOH}=1.0M\times6.5L \\ moles\text{ of NaOH}=6.5moles \end{gathered}[/tex]Determine the required mass of NaOH
[tex]\begin{gathered} Mass\text{ of NaOH}=moles\times molar\text{ mass} \\ Mass\text{ of NaOH}=6.5\cancel{moles}\times\frac{40g}{\cancel{mole}} \\ Mass\text{ of NaOH}=260grams \end{gathered}[/tex]Hence the grams of sodium hydroxide (NaOH) you need to make 6.5 L of 1.0M solution is 260grams
What is the molecular formula of the compound?Express your answer as a chemical formula.
Answer:
[tex]C_2H_4[/tex]Explanation:
Here, we want to get the chemical formula for the compound
From what we have, the compound contains hydrogen and carbon only
We also were given that the molar mass is 28.06 amu
Now,we beed to get the individual atomic mass of carbon and hydrogen
From records, carbon has an AMU of 12.01
The AMU of hydrogen is 1.00794
Looking at the total value, we can see that the max possible number of atoms of carbon present is 2
Now, we need to know the number of hydrogen atoms
Let us call this n
Mathematically, we know that the AMU of the compound is the sum of the AMU of the individual atoms
Hence, we have it that:
[tex]\begin{gathered} 28.06\text{ = 2(12.01) + n(1.00794)} \\ 1.00794n\text{ = 28.06 - 24.02} \\ 1.00794n\text{ = 4.04} \\ \\ n\text{ = }\frac{4.04}{1.00794} \\ \\ n\text{ = 4} \end{gathered}[/tex]Finally, we want to write the molecular formula of the compound
The molecular formula is written with carbon first, followed by its number of atoms as subscript, then hydrogen , with its number of atoms as subscript
We have this written as:
[tex]C_2H_4[/tex]Which of the following describes how difficult it is to remove a valence electron from an atom of a particular element?
A: Electron Affinity
B: Ionization energy
C: Atomic Radius
D: Electronegativity
Answer:
B: ionization energy
Explanation: